Question

我跟随老师给出的一个例子，但是当我实施它时，@ NotNull并没有与@Pattern一起使用姓名。

对于@NotNull我想在输入框旁边显示一条错误消息。出于某种原因，因为代码在这里它不会显示错误。

对于@Pattern，我试图检查名字或姓氏中是否有数字，以及是否确实返回错误。我试过看this pattern regexp constructs，但似乎无法让它正常工作。

的index.xhtml

<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://java.sun.com/jsf/html"
      xmlns:f="http://java.sun.com/jsf/core">
    <h:head>
        <title>Sign Up</title>
    </h:head>
    <h:body>
        <h:form id="componentForm">
            <h:panelGrid columns="3">
                Last name:
                <h:inputText id="lastName" value="#{register.lastName}"/>
                <h:messages for="lastName" errorStyle="color: red" infoStyle="color: green"/>
                First name:
                <h:inputText id="firstName" value="#{register.firstName}"/>
                <h:messages for="firstName" errorStyle="color: red" infoStyle="color: green"/>
                Password:
                <h:inputSecret id="password" value="#{register.password}"/>
                <h:messages for="password" errorStyle="color: red" infoStyle="color: green"/>
                Email:
                <h:inputText id="email" value="#{register.email}"/>
                <h:messages for="email" errorStyle="color: red" infoStyle="color: green"/>
                Phone number:
                <h:inputText id="phoneNumber" value="#{register.phoneNumber}"/>
                <h:messages for="phoneNumber" errorStyle="color: red" infoStyle="color: green"/>
                Gender:
                <h:selectOneRadio id="gender" value="#{register.gender}">
                    <f:selectItems value="#{register.genderItems}"/>
                </h:selectOneRadio>
                <h:messages for="gender" errorStyle="color: red" infoStyle="color: green"/>
                Languages:
                <h:selectManyCheckbox id="languages" value="#{register.languages}">
                    <f:selectItems value="#{register.languageItems}"/>
                </h:selectManyCheckbox>
                <h:messages for="languages" errorStyle="color: red" infoStyle="color: green"/>
                Hometown:
                <h:selectOneMenu id="hometown" value="#{register.hometown}">
                    <f:selectItems value="#{register.hometownItems}"/>
                </h:selectOneMenu>
                <h:messages for="hometown" errorStyle="color: red" infoStyle="color: green"/>
                <h:commandButton value="Sign Up" action="#{register.show}"/>
            </h:panelGrid>
        </h:form>
    </h:body>
</html>

register.java

package comp;

import javax.enterprise.context.RequestScoped;
import javax.inject.Named;
import javax.validation.constraints.Min;
import javax.validation.constraints.Max;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Pattern;
import javax.faces.model.SelectItem;
import java.util.List;

@Named
@RequestScoped
public class register {
    //@NotNull(message="First name cannot be null")
    @Pattern(regexp="[0-9]", message="Cannot contain numbers")
    private String firstName;

    @NotNull(message="Last name cannot be null")
    @Pattern(regexp="[0-9]", message="Cannot contain numbers")
    private String lastName;

    @Min(value=4, message="Password must contain at least 4 characters")
    private String password;

    @NotNull(message="Must enter an email address")
    @Pattern(regexp = "[a-zA-Z0-9]+@[a-zA-Z0-9]+\\.[a-zA-Z0-9]+", message = "Email format is invalid.")
    private String email;

    @Pattern(regexp="[0-9]*", message="Must contain only digits")
    private String phoneNumber;

    @NotNull(message="Must have a gender")
    private String gender;

    @NotNull(message="You must know one language")
    private List<SelectItem> languages;

    @NotNull(message="You must have hometown")
    private String hometown;

    public String getLastName(){
        return lastName;
    }
    public void setLastName(String lastName){
        this.lastName = lastName;
    }
    public String getFirstName(){
        return firstName;
    }
    public void setFirstName(String firstName){
        this.firstName = firstName;
    }
    public String getPassword(){
        return password;
    }
    public void setPassword(String password){
        this.password = password;
    }
    public String getEmail(){
        return email;
    }
    public void setEmail(String email){
        this.email = email;
    }
    public String getPhoneNumber(){
        return phoneNumber;
    }
    public void setPhoneNumber(String phoneNumber){
        this.phoneNumber = phoneNumber;
    }
    public String getGender(){
        return gender;
    }
    public void setGender(String gender){
        this.gender = gender;
    }
    public List<SelectItem> getGenderItems(){
        return Utility.genderList();
    }
    public List<SelectItem> getLanguages(){
        return languages;
    }
    public void setLanguages(List<SelectItem> languages){
        this.languages = languages;
    }
    public List<SelectItem> getLanguageItems(){
        return Utility.languageList();
    }
    public String getHometown(){
        return hometown;
    }
    public void setHometown(String hometown){
        this.hometown = hometown;
    }
    public List<SelectItem> getHometownItems(){
        return Utility.hometownList();
    }
    public String show(){
        return "showinfo";
    }
}

Answer 1

要验证名字和姓氏，您必须匹配字母，而不是数字。

使用

@Pattern(regexp="[a-zA-Z]")

或者，匹配任何国际字母：

@Pattern(regexp="\\p{L}")

Bean验证问题（@NotNull和@Pattern）

1 个答案: